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Interesting !?:
Starting from the top: the lips, mouth, throat. trachea, larynx, right and left main stem bronchi, smaller bronchial passages and the tiny alveoli (where oxygen & carbon dioxide are exchanged) and the pulmonary vessels are all part of the respiratory system One of its most remarkable aspects is its ability to make speech and other sounds. There's no other like it in the animal kingdom.
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3

Get oxygen to blood:
Respiration is the process of bringing oxygen into the lungs and exhaling carbon dioxide out of them. Once inside the lungs, the oxygen crosses cell membranes to get into the blood stream. The blood circulates the oxygen to the rest of the body including the brain which cannot function without it. Carbon dioxide is the waste product of well functioning cells and is also carried back by the blood.
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5

Nicotine:
Nicotine metabolizes quickly in the body. Usually within 8 hours, also it depends on the amount someone smokes. The effects of smoking like if someone had copd- reversal of lung function may take 3- 6 months( provided there is not already a structural damage).
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6

Yes and no:
Many people live in dusty conditions (mild) for considerable time with no apparent distress. Others may develop mild to severe allergies. Dust contains many microscopic things one of which is dust mites. People can be severely allergic to these and require a lot of treatment. The best thing to do is dust mitigation. Look up on the internet how to reduce home dust problems or see you doctor.
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7

Help you breathe:
Lungs help you breathe and those are vital to living. There are many ways to treat any problems that occur such as inhalents. When one has emphysema there is even portable oxygen available if needed.
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8

Breathing:
The respiratory system consists of all organs in the body related to breathing including the nose, mouth, trachea and lungs. All four of these are essential for normal breathing.
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10

All:
All house hold chemicals have potential harm to some people. The us government require a special label explaining how each product is to be used and what precautions to take when using. Never take for granted using a simple benign looking product without following the directions. Fatal combination of products can occur easily if you don't read carefully what the label says! read label!
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